| Index: src/objects.cc | 
| diff --git a/src/objects.cc b/src/objects.cc | 
| index 250e009b24f12c24582900bb2a4bcd89b77ab349..38f1657fa6c767a27e6db846fc39d830a72033fc 100644 | 
| --- a/src/objects.cc | 
| +++ b/src/objects.cc | 
| @@ -2815,6 +2815,14 @@ MUST_USE_RESULT Handle<Object> JSProxy::CallTrap(const char* name, | 
| } | 
|  | 
|  | 
| +void JSObject::AddFastPropertyUsingMap(Handle<JSObject> object, | 
| +                                       Handle<Map> map) { | 
| +  CALL_HEAP_FUNCTION_VOID( | 
| +      object->GetIsolate(), | 
| +      object->AddFastPropertyUsingMap(*map)); | 
| +} | 
| + | 
| + | 
| MaybeObject* JSObject::SetPropertyForResult(LookupResult* result, | 
| String* name_raw, | 
| Object* value_raw, | 
|  |